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D-Backs Notes: Del Castillo, Thomas, Rotation

By Anthony Franco | February 17, 2026 at 10:55pm CDT

The Diamondbacks are expected to begin the year without catcher/first baseman Adrian Del Castillo. Manager Torey Lovullo said Monday that the 26-year-old is dealing with a left calf injury that’ll keep him out of game action for the bulk of Spring Training (link via Alex Weiner of Arizona Sports). He’ll be reassessed closer to Opening Day but it seems unlikely he’ll get enough exhibition reps to avoid a season-opening injured list stay.

Del Castillo is third on the catching depth chart after Gabriel Moreno and James McCann. He nevertheless had a strong chance to win a bench job if healthy. Tyler Locklear will begin the season on the IL as he rehabs elbow and shoulder surgeries. The lefty-hitting Del Castillo has a fair bit of first base and designated hitter experience. Arizona doesn’t have a ton of position player depth on the 40-man roster, leaving a couple bench jobs up for grabs.

After an encouraging 25-game debut two years ago, Del Castillo struggled last season. He struck out 47 times in 131 plate appearances (a near-36% rate) while hitting .242/.290/.392 over 44 games. The Miami product has posted strong numbers throughout his minor league career, but they’ve always come with a concerning level of swing-and-miss. He’s a below-average defensive catcher, putting more pressure on the bat if most of his work comes in the first base/DH mix.

Pavin Smith and Carlos Santana are projected for a first base platoon. They’ll also get a decent number of DH reps, while Lovullo said Ketel Marte will log some time there in addition to his primary second base work. The D-Backs are reportedly poking around the trade market for a utility piece after they dealt Blaze Alexander to Baltimore for reliever Kade Strowd and a pair of minor leaguers. They’ll ideally find someone with more offensive punch than Tim Tawa and non-roster invitees Ildemaro Vargas and Jacob Amaya to play that role.

The bottom half of the lineup would be an even bigger concern if Corbin Carroll opens the season on the IL. Arizona’s star right fielder will miss most of Spring Training following last week’s hamate surgery. The hope is for Carroll to make it back by the beginning of the regular season. Fellow outfielder Alek Thomas tells Nick Piecoro of The Arizona Republic that he’s working mostly between left and center field with the expectation that Carroll will be in his typical position on Opening Day.

Thomas has played all three outfield positions in the minor leagues. He has played exclusively center field as a big leaguer, logging more than 3000 innings up the middle. Thomas is a quality defender who shouldn’t have any issue adjusting to a corner if the D-Backs need him to move around. Arizona is trying to get Jordan Lawlar acclimated to playing center field.

Lawlar has a higher offensive ceiling than Thomas has shown over 420 MLB contests, so the latter would be best suited for a fourth outfield role if everyone’s healthy. They’ll probably need both players in the starting lineup to begin the season, as Lourdes Gurriel Jr. will also open the year on the injured list after last summer’s ACL injury. Thomas could be a stopgap left fielder until Gurriel returns and/or prospect Ryan Waldschmidt plays his way to the big leagues.

There’s a fair bit of opportunity in one of the more top-heavy lineups in MLB. Carroll, Marte, Moreno and Geraldo Perdomo make for an excellent top half of a batting order. Nolan Arenado is on the downside of his career but should still be a solid everyday third baseman. The bottom third of the lineup and most of the bench is a lot less established.

It’s not quite as extreme on the pitching side, but there are some parallels. Free agent returnees Merrill Kelly and Zac Gallen are locked into the rotation; Lovullo has already named Kelly his Opening Day starter. Ryne Nelson figures to have a mid-rotation spot secure, but the Diamondbacks aren’t making any firm commitments beyond that.

“I can’t even really make comments about any projections or what the starting rotation is going to look like,” Lovullo told reporters (including Steve Gilbert of MLB.com). Right now, it looks as if Eduardo Rodriguez, Brandon Pfaadt and Michael Soroka are battling for two spots. Rodriguez and Soroka will be on the MLB roster, but Pfaadt has a pair of minor league options and could open the season in Triple-A. Soroka has the most experience of that group in a swing role and would be the most familiar with pitching in long relief if the D-Backs want all six pitchers on the active roster with a five-man rotation. One injury might take the decision out of Lovullo’s hands, but it’s another camp battle that Arizona fans will want to follow during exhibition play.

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Arizona Diamondbacks Adrian Del Castillo Alek Thomas Brandon Pfaadt Eduardo Rodriguez Michael Soroka

Tony Clark Steps Down As MLBPA Executive Director
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4 Comments

  1. Rsox

    1 hour ago

    Trading Alexander made no sense and left a big hole on the bench. There isn’t much left in free agency unless the D’backs want to sign of the Urias’

    Reply
    • Angels & NL West

      50 minutes ago

      Losing Alexander hurt even before all the injuries started popping up. He was a versatile defender that showed improved plate discipline with regular ABs and provided some spark inside the clubhouse. That said, the Dbacks desperately need BP arms, like Strowd, that can potentially pitch high leverage innings and the cost was gonna hurt.

      1
      Reply
  2. GabrielMorenoSuperfan

    46 minutes ago

    Can’t even make it to spring training without a million injuries what is going on

    1
    Reply
  3. Angels & NL West

    43 minutes ago

    Anxious to see how the rotation shakes out behind Kelly, Nelson and Gallen. I’d like to see Pfaadt and Soroka earn the SP 4&5 slots, but given that Soroka is probably limited to 20ish starts and 100+ innings, I’m guessing he’s the odd man out to start the season. Injuries and/or underperformance will inevitably provide Soroka an opportunity to join the rotation before seasons end.

    Reply

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